
Purpose of disconnect switch
- Disconnect switches establish isolation points to enable equipment maintenance. They are installed on both sides of the circuit breaker, high-side of the transformer, and on the line exit.
- Switches cannot and should not be used to interrupt load current or fault current. A switch operation takes place after the circuit is de-energized.

Cost of disconnect switch
A switch can be designed in numerous ways – vertical break, center break, side break, double side break, pantograph,
- 15kV 600A/1200A disconnect switch with manual operator: ~$7,000
- 35kV 1200A disconnect switch with manual operator: ~$7,000
- 69kV 1200A disconnect switch with manual operator: ~$14,000
- 138kV 2000A disconnect switch with motor operator: ~$20,000
- 230kV 3000A disconnect switch with motor operator: ~$33,000
- 345kV 3000A disconnect switch with motor operator: ~$66,000
- 500kV 3000A disconnect switch with motor operator: ~$102,000
- 765kV 3000A disconnect switch with motor operator: ~$150,000
Note: The cost includes the price of structural steel. For 138kV and above, the price of steel for high switch stand used (for conservative figures).
Lead time to procure disconnect switch
~22 weeks for a high voltage switch.
Information on cost and lead time is for your general knowledge only. Contact vendor with your equipment specifications for actual figures.
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